52157993 has 2 divisors, whose sum is σ = 52157994. Its totient is φ = 52157992.

The previous prime is 52157981. The next prime is 52158013. The reversal of 52157993 is 39975125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50737129 + 1420864 = 7123^2 + 1192^2 .

It is a cyclic number.

It is not a de Polignac number, because 52157993 - 2⁶ = 52157929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52157993.

It is not a weakly prime, because it can be changed into another prime (52157923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26078996 + 26078997.

It is an arithmetic number, because the mean of its divisors is an integer number (26078997).

Almost surely, 2^52157993 is an apocalyptic number.

It is an amenable number.

52157993 is a deficient number, since it is larger than the sum of its proper divisors (1).

52157993 is an equidigital number, since it uses as much as digits as its factorization.

52157993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85050, while the sum is 41.

The square root of 52157993 is about 7222.0490859589. The cubic root of 52157993 is about 373.6287531155.

The spelling of 52157993 in words is "fifty-two million, one hundred fifty-seven thousand, nine hundred ninety-three".